From patchwork Mon Sep 21 14:17:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kai Vehmanen X-Patchwork-Id: 11789935 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4F5F2618 for ; Mon, 21 Sep 2020 14:22:56 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A2BC32193E for ; Mon, 21 Sep 2020 14:22:55 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="WoBfGwpa" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A2BC32193E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 2060916E7; Mon, 21 Sep 2020 16:22:10 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 2060916E7 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1600698174; bh=cYznO1sr9V4Qr4CRQutcWpnzk1N9PC2hkwm13mrB9JI=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=WoBfGwpaMEeScudiD/ctuVPvbanqohzAS9FJfDr6guw8oSBT4ycRv8n6iZMt/9D/I GTgAsJsnY+dY+IGqazOWHEeKmJ7grEr24KZgz1X0tMX5UWokoJQTnh2VSwpU0hAWLp WkensVUkoAbfEDnJINX+LstoRFz7BZHhvDGYEsVQ= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 80985F802E0; Mon, 21 Sep 2020 16:19:46 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 8F1E0F8015F; Mon, 21 Sep 2020 16:19:41 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=SPF_HELO_NONE,SPF_NONE, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mga17.intel.com (mga17.intel.com [192.55.52.151]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 8D378F8015F for ; Mon, 21 Sep 2020 16:19:28 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 8D378F8015F IronPort-SDR: fl0+MlyKRwL5oib8s+woyO8SOUW0m31HL95so5UzWBLB+Ot4ePGr5ub7IWgx+lVxfv8240WnxB fjZO97DFRlIg== X-IronPort-AV: E=McAfee;i="6000,8403,9750"; a="140394088" X-IronPort-AV: E=Sophos;i="5.77,286,1596524400"; d="scan'208";a="140394088" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Sep 2020 07:19:19 -0700 IronPort-SDR: SiRsxVeD3/hSHBhPqLYLkviPvtX9NPsR6y0/CpOHSGzWh2pwkPAwn2whaJsqpjxJxXFFJQ8i3U s+7/jAbtHjOg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.77,286,1596524400"; d="scan'208";a="485495422" Received: from eliteleevi.tm.intel.com ([10.237.54.20]) by orsmga005.jf.intel.com with ESMTP; 21 Sep 2020 07:19:18 -0700 From: Kai Vehmanen To: alsa-devel@alsa-project.org, tiwai@suse.de Subject: [PATCH 3/4] ALSA: hda - handle multiple i915 device instances Date: Mon, 21 Sep 2020 17:17:40 +0300 Message-Id: <20200921141741.2983072-4-kai.vehmanen@linux.intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200921141741.2983072-1-kai.vehmanen@linux.intel.com> References: <20200921141741.2983072-1-kai.vehmanen@linux.intel.com> MIME-Version: 1.0 Cc: kai.vehmanen@linux.intel.com X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Currently i915_component_master_match() will return the first matching i915 instance. This does not work in case system has multiple i915 and HDA audio controller instances. Add a new connectivity check that handles following cases: - i915 and HDA controller on same PCI bus - discrete GPU with embedded HDA audio controller connected via PCI bridge Signed-off-by: Kai Vehmanen --- sound/hda/hdac_i915.c | 44 +++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 42 insertions(+), 2 deletions(-) diff --git a/sound/hda/hdac_i915.c b/sound/hda/hdac_i915.c index 3c2db3816029..50b2c1db429b 100644 --- a/sound/hda/hdac_i915.c +++ b/sound/hda/hdac_i915.c @@ -73,11 +73,51 @@ void snd_hdac_i915_set_bclk(struct hdac_bus *bus) } EXPORT_SYMBOL_GPL(snd_hdac_i915_set_bclk); +/** + * Returns true if the devices can be connected for audio. + */ +static bool connectivity_check(struct pci_dev *i915, struct pci_dev *hdac) +{ + struct pci_bus *bus_a = i915->bus, *bus_b = hdac->bus; + + /* directly connected on the same bus */ + if (bus_a == bus_b) + return true; + + /* + * on i915 discrete GPUs with embedded HDA audio, the two + * devices are connected via 2nd level PCI bridge + */ + bus_a = bus_a->parent; + bus_b = bus_b->parent; + if (!bus_a || !bus_b) + return false; + bus_a = bus_a->parent; + bus_b = bus_b->parent; + if (bus_a && bus_a == bus_b) + return true; + + return false; +} + static int i915_component_master_match(struct device *dev, int subcomponent, void *data) { - return !strcmp(dev->driver->name, "i915") && - subcomponent == I915_COMPONENT_AUDIO; + struct pci_dev *hdac_pci, *i915_pci; + struct hdac_bus *bus = data; + + if (!dev_is_pci(dev)) + return 0; + + hdac_pci = to_pci_dev(bus->dev); + i915_pci = to_pci_dev(dev); + + if (!strcmp(dev->driver->name, "i915") && + subcomponent == I915_COMPONENT_AUDIO && + connectivity_check(i915_pci, hdac_pci)) + return 1; + + return 0; } /* check whether intel graphics is present */